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参数资料
| 型号： | LMV431CMWC |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 基准电压源/电流源 |
| 英文描述： | 1-OUTPUT TWO TERM VOLTAGE REFERENCE, 1.24 V, UUC |
| 封装： | WAFER |
| 文件页数： | 1/18页 |
| 文件大小： | 596K |
| 代理商： | LMV431CMWC |
LMV431/LMV431A/LMV431B
Low-Voltage (1.24V) Adjustable Precision Shunt
Regulators
General Description
The LMV431, LMV431A and LMV431B are precision 1.24V
shunt regulators capable of adjustment to 30V. Negative
feedback from the cathode to the adjust pin controls the
cathode voltage, much like a non-inverting op amp configu-
ration (Refer to Symbol and Functional diagrams). A two
resistor voltage divider terminated at the adjust pin controls
the gain of a 1.24V band-gap reference. Shorting the cath-
ode to the adjust pin (voltage follower) provides a cathode
voltage of a 1.24V.
The LMV431, LMV431A and LMV431B have respective ini-
tial tolerances of 1.5%, 1% and 0.5%. The LMV431 and
LMV431A are available in commercial and Industrial tem-
perature ranges. The LMV431B is only available in commer-
cial temperature range.
The LMV431, LMV431A and LMV431B functionally lends
themselves to several applications that require zener diode
type performance at low voltages. Applications include a 3V
to 2.7V low drop-out regulator, an error amplifier in a 3V
off-line switching regulator and even as a voltage detector.
These parts are typically stable with capacitive loads greater
than 10nF and less than 50pF.
The LMV431, LMV431A and LMV431B provide performance
at a competitive price.
Features
n
Low Voltage Operation/Wide Adjust Range (1.24V/30V)
n
0.5% Initial Tolerance (LMV431B)
n
Temperature Compensated for Industrial Temperature
Range (39 PPM/C for the LMV431AI)
n
Low Operation Current (55A)
n
Low Output Impedance (0.25
)
n
Fast Turn-On Response
n
Low Cost
Applications
n
Shunt Regulator
n
Series Regulator
n
Current Source or Sink
n
Voltage Monitor
n
Error Amplifier
n
3V Off-Line Switching Regulator
n
Low Dropout N-Channel Series Regulator
Connection Diagrams
TO92: Plastic Package
10095801
Top View
SOT23-5
10095844
*Pin 1 is not internally connected.
*Pin 2 is internally connected to Anode pin. Pin 2 should be either floating
or connected to Anode pin.
Top View
SOT23-3
10095867
Top View
June 2002
LMV431/LMV431A/LMV431B
Low-V
oltage
(1.24V)
Adjustable
Precision
Shunt
Regulators
2002 National Semiconductor Corporation
DS100958
www.national.com
相关PDF资料 |
PDF描述 |
|---|---|
| LMV431AIMDC | 1-OUTPUT TWO TERM VOLTAGE REFERENCE, 1.24 V, UUC |
| LMV431IMWC | 1-OUTPUT TWO TERM VOLTAGE REFERENCE, 1.24 V, UUC |
| LMV431ACMDC | 1-OUTPUT TWO TERM VOLTAGE REFERENCE, 1.24 V, UUC |
| LMV431ACZ/NOPB | 1-OUTPUT TWO TERM VOLTAGE REFERENCE, 1.24 V, PBCY3 |
| LMV431BCZ/NOPB | 1-OUTPUT TWO TERM VOLTAGE REFERENCE, 1.24 V, PBCY3 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LMV431CZ | 功能描述:基准电压& 基准电流 RoHS:否 制造商:STMicroelectronics 产品:Voltage References 拓扑结构:Shunt References 参考类型:Programmable 输出电压:1.24 V to 18 V 初始准确度:0.25 % 平均温度系数（典型值）:100 PPM / C 串联 VREF - 输入电压（最大值）: 串联 VREF - 输入电压（最小值）: 分流电流（最大值）:60 mA 最大工作温度:+ 125 C 封装 / 箱体:SOT-23-3L 封装:Reel |
| LMV431CZ | 制造商:Texas Instruments 功能描述:SHUNT REG ADJ +1.24-30V TO-92 431 |
| LMV431CZ/NOPB | 功能描述:基准电压& 基准电流 RoHS:否 制造商:STMicroelectronics 产品:Voltage References 拓扑结构:Shunt References 参考类型:Programmable 输出电压:1.24 V to 18 V 初始准确度:0.25 % 平均温度系数（典型值）:100 PPM / C 串联 VREF - 输入电压（最大值）: 串联 VREF - 输入电压（最小值）: 分流电流（最大值）:60 mA 最大工作温度:+ 125 C 封装 / 箱体:SOT-23-3L 封装:Reel |
| LMV431IM5 | 功能描述:基准电压& 基准电流 RoHS:否 制造商:STMicroelectronics 产品:Voltage References 拓扑结构:Shunt References 参考类型:Programmable 输出电压:1.24 V to 18 V 初始准确度:0.25 % 平均温度系数（典型值）:100 PPM / C 串联 VREF - 输入电压（最大值）: 串联 VREF - 输入电压（最小值）: 分流电流（最大值）:60 mA 最大工作温度:+ 125 C 封装 / 箱体:SOT-23-3L 封装:Reel |
| LMV431IM5 | 制造商:Texas Instruments 功能描述:SHUNT REG ADJ +1.24/30V SOT-23-5 |
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